“None can reply - all seems eternal now. The wilderness has a mysterious tongue, which teaches awful doubt.”

“When I view all beings not as special creations, but as the lineal descendants of some few beings which lived long before the first bed of the Cambrian system was deposited, they seem to me to beco...”

“If I had my life to live over again, I would have made a rule to read some poetry and listen to some music at least once every week.”

“A man who dares to waste one hour of time has not discovered the value of life.”

“Thus, from the war of nature, from famine and death, the most exalted object which we are capable of conceiving, namely, the production of the higher animals, directly follows. There is grandeur in...”

“We are not here concerned with hopes or fears, only with truth as far as our reason permits us to discover it.”

“The race is now on between the technoscientific and scientific forces that are destroying the living environment and those that can be harnessed to save it. . . . If the race is won, humanity can e...”

“None can reply - all seems eternal now. The wilderness has a mysterious tongue, which teaches awful doubt.”

“When Mother Nature speaks, even the Gods hold silence.”

“In the physical constitution of an organized being, that is, a being adapted suitably to the purposes of life, we assume it as a fundamental principle that no organ for any purpose will be found bu...”

“Fear and Love are the two emotional pillars of survival.”

“And people who believe in God think God has put human beings on earth because they think human beings are the best animal, but human beings are just an animal and they will evolve into another anim...”